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Search: id:A060204
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| A060204 |
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Square pyramorphic numbers: suppose the k-th square pyramidal number S(k) (A000330) ends in k; sequence gives value of S(k). |
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| 1, 55, 5525, 22140, 93665, 173880, 1378160, 3822225, 19096385, 21413400, 58695560, 81575625, 161553785, 170986800, 295372960, 555371185, 5595682560, 6032742625, 21341334000, 46478345185, 94121656560, 96947076625
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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C. Pickover, Wonders of Numbers, Oxford University Press, NY, 2001, p. 158-160.
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LINKS
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C. A. Pickover, "Wonders of Numbers, Adventures in Mathematics, Mind and Meaning," Zentralblatt review
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EXAMPLE
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55 is square pyramorphic because it is the 5-th square pyramidal number and ends in 5. 173880 is square pyramorphic because it is the 80-th square pyramidal number and ends in 80.
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CROSSREFS
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A093534 gives values of k. Cf. A000330.
Sequence in context: A119083 A037156 A116110 this_sequence A114049 A028471 A004708
Adjacent sequences: A060201 A060202 A060203 this_sequence A060205 A060206 A060207
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KEYWORD
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nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Mar 18 2001
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