A085100 Rearrangement of natural numbers such that the sum of n terms beginning with the n-th term is a palindrome. Smallest number not included earlier is given priority.

1, 2, 3, 4, 15, 5, 9, 6, 20, 7, 8, 10, 17, 11, 22, 12, 14, 13, 27, 16, 21, 18, 31, 19, 41, 23, 24, 25, 37, 26, 36, 28, 35, 29, 45, 30, 34, 32, 56, 33, 43, 38, 44, 39, 49, 40, 42, 46, 54, 47, 64, 48, 87, 50, 84, 51, 194, 52, 95, 53, 83, 55, 91, 57, 81, 58, 98, 59, 80, 60, 205

Offset

1,2

Links

Sean A. Irvine, Table of n, a(n) for n = 1..10000

Example

1, (2+3), (3+4+15), (4+15+5+9),... etc. are palindromes.

Crossrefs

Cf. A085101.

Sequence in context: A297840 A102483 A134916 * A337117 A204983 A249623

Adjacent sequences: A085097 A085098 A085099 * A085101 A085102 A085103

Keyword

base,nonn

Author

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Jul 03 2003

Extensions

More terms from David Wasserman, Jan 26 2005

Offset corrected by Sean A. Irvine, Jun 01 2026

Status

approved