A138872 Concatenation of first 3 digits and last 3 digits of n-th even superperfect number A061652(n).

22, 44, 1616, 6464, 409096, 655536, 262144, 107824, 115976, 309056, 811064, 850864, 343576, 265064, 520544, 737504, 223176, 129536, 953496, 142304, 239056, 173776, 140096, 215736, 224376, 201256, 427336, 268104, 260504, 256656, 373224, 870944

Offset

1,1

Comments

Also, concatenation of first 3 digits and last 3 digits of n-th superperfect number A019279(n), if there are no odd superperfect numbers.

Links

Table of n, a(n) for n=1..32.

Crossrefs

Cf. A019279, A061652, A138866, A138877, A138870, A138871.

Sequence in context: A342171 A092328 A138869 * A003858 A335468 A041956

Adjacent sequences: A138869 A138870 A138871 * A138873 A138874 A138875

Keyword

base,nonn,less

Author

Omar E. Pol, Apr 02 2008

Extensions

More terms from Max Alekseyev, Feb 11 2012

Status

approved