0,5

Row n of A049597 has a(n+1) nonzero values.

There are three 1's, one from the natural numbers and two from A033638.

When viewed as an array the sequence begins:

0

1

1 1

2 2

3 3 4

5 5 6

7 7 8 9

10 10 11 12

13 13 14 15 16

17 17 18 19 20

21 21 22 23 24 25

26 26 27 28 29 30

...

Cf. A033638, A049597, A054243, A060510.

Cf. A002620, A083480, A083906.

Sequence in context: A103355 A029092 A024699 this_sequence A112231 A084630 A007360

Adjacent sequences: A083476 A083477 A083478 this_sequence A083480 A083481 A083482

easy,nonn,tabf

Alford Arnold (Alford1940(AT)aol.com), Jun 08 2003

Edited and extended by David Wasserman (wasserma(AT)spawar.navy.mil), Nov 16 2004