Heptagonal Pyramidal Number
Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A heptagonal pyramidal number is the sum of the first few heptagonal numbers. The heptagonal number for n can be calculated by adding up the heptagonal numbers for 1 to n, or by using the formula n(n + 1)(5n – 2)/6. The first few heptagonal pyramidal numbers are: 1, 8, 26, 60, 115, 196, 308, 456, 645, 880, 1166, 1508, 1911, 2380, 2920, 3536, 4233, 5016, 5890, 6860, 7931, 9108 (sequence A002413 in OEIS) Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.
ISBN: 978-6-1312-6388-0
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Книга по требованию
Дата выхода: июль 2011