A295510 The numerators of the fractions in the Schinzel-Sierpiński tree A295511, read across levels. Also an encoding of Stern's diatomic series A002487.

2, 2, 3, 3, 7, 5, 7, 2, 17, 7, 11, 5, 11, 13, 5, 3, 241, 17, 29, 7, 17, 31, 43, 13, 43, 11, 17, 13, 29, 193, 11, 2, 13, 11, 37, 73, 67, 29, 41, 7, 23, 97, 79, 31, 73, 29, 19, 5, 37, 43, 73, 31, 157, 17, 23, 13, 41, 43, 199, 17, 19, 11, 7

Offset

1,1

Links

Table of n, a(n) for n=1..63.

Example

The triangle (row lengths are 2^(n-1)) starts:
1: 2
2: 2, 3
3: 3, 7, 5, 7
4: 2, 17, 7, 11, 5, 11, 13, 5
5: 3, 241, 17, 29, 7, 17, 31, 43, 13, 43, 11, 17, 13, 29, 193, 11

Prog

(Sage) # uses[SSETree from A295511]
def A295510_row(n):
    if n == 1: return [2]
    return [r.numerator() for r in SSETree(n)]
for n in (1..6): print(A295510_row(n))

Crossrefs

Cf. A002487, A295510, A295512.

Sequence in context: A192495 A162223 A133076 * A324520 A307737 A309684

Adjacent sequences: A295507 A295508 A295509 * A295511 A295512 A295513

Keyword

nonn,tabf

Author

Peter Luschny, Nov 23 2017

Status

approved