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Bryan Wolf, Table of n, a(n) for n = 0..13376 (terms < 10^10))
Bryan Wolf, C++ program for generating happy numbers without zeros and with digits in non-decreasing order
Cf. A007770 (Happy numbers), A068571, A219667.
Sequence in context: A121058 A007921 A092409 * A109369 A088982 A176406
Adjacent sequences: A124092 A124093 A124094 * A124096 A124097 A124098
Tanya Khovanova, Nov 25 2006