A115025 a(n) = n-th element of n-th row of triangle shown below.

1, 2, 2, 7, 3, 21, 25, 113, 17, 289, 321, 1665, 769, 5633, 7169, 30721, 2049, 69633, 73729, 409601, 163841, 1376257, 1703937, 7602177, 1572865, 19922945, 23068673, 113246209, 58720257, 385875969, 503316481, 2080374785, 67108865, 4429185025, 4563402753

Offset: 1

Author

Jonas Wallgren, Feb 24 2006

Keywords

• nonn

Comments

1

1..............................................2

1......................3.......................2.......................4

1...........5..........3...........7...........2...........6...........4...........8

1.....9.....5....13....3....11.....7....15.....2....10.....6....14.....4....12.....8....16

1.17..9.25..5.21.13.29.3.19.11.27..7.23.15.31..2.18.10.26..6.22.14.30..4.20.12.28..8.24.16.32

...

Links

• Alois P. Heinz, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A049773.

Extensions

Offset changed to 1 by Alois P. Heinz, Feb 26 2015

a(16)-a(35) from Alois P. Heinz, Feb 26 2015