A342703 If n is odd then a(n)/a(n+1) = (digit sum of a(n))/(digit sum of a(n+1)) = (digit product of a(n))/(digit product of a(n+1)).

1, 2, 1, 3, 1, 4, 1, 5, 1, 6, 1, 7, 1, 8, 1, 9, 2, 3, 2, 4, 2, 5, 2, 6, 2, 7, 2, 8, 2, 9, 3, 4, 3, 5, 3, 6, 3, 7, 3, 8, 3, 9, 4, 5, 4, 6, 4, 7, 4, 8, 4, 9, 5, 6, 5, 7, 5, 8, 5, 9, 6, 7, 6, 8, 6, 9, 7, 8, 7, 9, 8, 9, 1362, 1816, 1635, 1962, 2334, 2723, 3366, 3927

Offset

1,2

Comments

This is the lexicographically earliest sequence of integers with this property.

Links

Carole Dubois, Table of n, a(n) for n = 1..160

Example

a(73) = 1362 and a(74) = 1816; we get: 1362/1816 = 3/4 = (1+3+6+2)/(1+8+1+6) = 12/16 = (1*3*6*2)/(1*8*1*6) = 36/48.

Crossrefs

Cf. A038186 (numbers divisible by the sum and product of their digits).

Sequence in context: A249009 A378359 A162520 * A249068 A308073 A090331

Adjacent sequences: A342700 A342701 A342702 * A342704 A342705 A342706

Keyword

nonn,base

Author

Carole Dubois and Eric Angelini, Mar 18 2021

Status

approved