A191862 First member of a pair of numbers occurring in the definition of 2-happy couples.

1, 1, 1, 3, 1, 2, 7, 1, 5, 1, 7, 1, 2, 1, 23, 1, 7, 99, 1, 4, 5, 43, 1, 1, 9, 51, 3, 1, 1, 1, 5, 47, 4005, 16, 277, 1, 11, 4, 193, 57, 191, 3, 1, 1, 2, 3383, 7, 21, 70, 20621, 1, 13, 5, 17, 20, 25, 51, 217, 1, 7, 9041, 5, 1, 416941, 1, 251, 1, 1, 15, 3, 5

Offset

1,4

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)
a191862 = fst . sqrtPair . a007970
-- Function sqrtPair is defined in A007968.
-- Reinhard Zumkeller, Oct 11 2015

Crossrefs

Cf. A007968, A007970.

Sequence in context: A134348 A331789 A308001 * A266055 A074305 A151855

Adjacent sequences: A191859 A191860 A191861 * A191863 A191864 A191865

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