A053779 -id:A053779 - cp's OEIS frontend

A053780 Palindromes arising in A053779.

4, 434, 505, 18781, 27072, 33633, 1254521, 3360633, 5989895, 9145419, 10411401, 161101161, 390949093, 795303597, 935424539, 25127372152, 77753535777, 1997671767991, 2300809080032, 3754911194573, 6476856586746, 9825337335289

Offset: 1

G. L. Honaker, Jr., Mar 29 2000

a(8)=3360633 coincides with A171706(3) and A171741(6) (and see a(6)=33633 here).

Also, note that A029965 ran just short of the OEIS space limitation, possibly affecting discovery.

P. De Geest, Palindromic Sums
C. Rivera, PrimePuzzle 89

Cf. A002808, A002113, A053779, A171706, A171741, A029965, A029966.

More terms from Patrick De Geest, Nov 15 2000

A057959 Sum of composite numbers up to n is palindromic.

Original entry on oeis.org

4, 34, 36, 215, 258, 288, 1711, 2785, 3708, 4572, 4873, 18986, 29509, 42005, 45534, 234272, 411232, 2074123, 2225480, 2841251, 3728941, 4590401, 17643216, 72349270, 176262062, 219311147, 426454179, 444875288, 1457527586

Offset: 1

G. L. Honaker, Jr. and Patrick De Geest, Nov 15 2000

Sequence is 4 + 6 + 8 + 9 + 10 + 12 + ... + n.

Patrick De Geest, Palindromic Sums.
Carlos Rivera, Puzzle 89, The Prime Puzzles & Problems Connection.

Cf. A002113, A002808, A053779, A053780.

a(n) = A002808(A053779(n)). - R. J. Mathar, Sep 09 2015

cp's OEIS Frontend

A053780 Palindromes arising in A053779.

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