A191863 Second member of a pair of numbers occurring in the definition of 2-happy couples.

1, 1, 3, 1, 2, 1, 3, 5, 1, 1, 39, 3, 1, 1, 78, 7, 1, 13, 4, 1, 3, 5, 3, 9, 1, 11, 1, 1, 2, 5, 1, 477, 389, 3, 51, 11, 1, 5, 2175, 5, 33, 7, 2, 6, 1, 41571, 44, 5, 11, 3201, 13, 1, 11, 9, 3, 11, 37, 2999, 7, 1, 127539, 8, 1, 57003, 3, 17, 5, 15, 1, 1, 1, 17

Offset

1,3

Comments

a(n) is odd, as is A191862(n).

Links

Reinhard Zumkeller, Table of n, a(n) for n = 1..99

J. H. Conway, On Happy Factorizations, J. Integer Sequences, Vol. 1, 1998, #1.

Initial Happy Factorization Data

Prog

(Haskell)
a191863 = snd . sqrtPair . a007970
-- Function sqrtPair is defined in A007968.
-- Reinhard Zumkeller, Oct 11 2015

Crossrefs

Cf. A007968, A007970.

Sequence in context: A178830 A029329 A287872 * A166866 A370220 A177343

Adjacent sequences: A191860 A191861 A191862 * A191864 A191865 A191866

Keyword

nonn

Author

Reinhard Zumkeller, Jun 18 2011

Extensions

Wrong comment and wrong formula removed (thanks to Wolfdieter Lang, who pointed this out) by Reinhard Zumkeller, Oct 11 2015

Status

approved