A337064 a(n) is the index of the first occurrence of n in A337063, or -1 if n never appears.

0, 3, 5, 2, 16, 20, 30, 40, 9, 23, 90, 57, 110, 29, 36, 12, 220, 33, 342, 230, 163, 179, 494, 19, 15, 109, 128, 88, 694, 82, 744, 43, 125, 219, 169, 72, 1060, 373, 253, 85, 1205, 113, 1346, 151, 207, 564, 1726, 131, 75, 332

Offset: 1

Author

Alex Lauber, Aug 13 2020

Keywords

• nonn

Comments

419 is the lowest number that does not appear in the first 100000 terms of A337063.

Examples

			A337063 starts {1, 1, 4, 2, ...} so a(2) = 3.
		

Links

• Rémy Sigrist, Table of n, a(n) for n = 1..10000
• Rémy Sigrist, PARI program for A337064

Crossrefs

Cf. A337063, A316774 (adds the two previous terms), A316973 (similar index for the addition sequence).

Programs

PARI

See Links section.