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 A060201 Images of centered hexamorphic numbers: suppose k-th centered hexagonal number H_c(k) (A003215) ends in k; sequence gives value of H_c(k). 0
 1, 127, 817, 7651, 13267, 83167, 188251, 520417, 751501, 1332667, 1689751, 2519917, 4691251, 8331667, 75015001, 88015417, 117206251, 133326667, 325510417, 833316667, 7500150001, 9492356251, 10950460417 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Note that all centered hexamorphic numbers end in the digits 1 and 7. REFERENCES C. Pickover, Wonders of Numbers, Oxford University Press, NY, 2001, p. 152-155. LINKS C. A. Pickover, "Wonders of Numbers, Adventures in Mathematics, Mind and Meaning," Zentralblatt review EXAMPLE 127 is centered hexamorphic because it is the 7th centered hexagonal number and ends in 7. 817 is the 17th centered hexagonal and ends in 17. PROG (PARI) lista(nn) = {for (n=0, nn, my(m = 3*n*(n-1)+1); if ((m - n) % 10^#Str(n) == 0, print1(m, ", ")); ); } \\ Michel Marcus, Jun 21 2018 CROSSREFS Cf. A003215. Sequence in context: A332574 A049202 A204737 * A140630 A183829 A168487 Adjacent sequences:  A060198 A060199 A060200 * A060202 A060203 A060204 KEYWORD base,nonn AUTHOR Jason Earls, Mar 18 2001 STATUS approved

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Last modified December 5 04:10 EST 2021. Contains 349530 sequences. (Running on oeis4.)