A176430 Integers equal to sqrt(A174864/4).

3, 21, 903, 1631721, 5325028475403, 56711856527710922180500221, 82753323662259982099234097722219590008756576353188748920925694383267934319786203404455994065868822592721

Offset

1,1

Comments

a(n) is divisible by 3.

a(n+1)/a(n)= A000058(n) [From Giovanni Teofilatto, Apr 18 2010]

Links

Table of n, a(n) for n=1..7.

Crossrefs

Cf. A174864, A176349.

Sequence in context: A162924 A079269 A127104 * A340505 A327037 A144621

Adjacent sequences: A176427 A176428 A176429 * A176431 A176432 A176433

Keyword

nonn

Author

Giovanni Teofilatto, Apr 17 2010

Status

approved