A061476 First (leftmost) digit - second digit + third digit - fourth digit .... = 7.

7, 70, 81, 92, 106, 117, 128, 139, 205, 216, 227, 238, 249, 304, 315, 326, 337, 348, 359, 403, 414, 425, 436, 447, 458, 469, 502, 513, 524, 535, 546, 557, 568, 579, 601, 612, 623, 634, 645, 656, 667, 678, 689, 700, 711, 722, 733, 744, 755, 766, 777, 788

Offset

1,1

Links

Table of n, a(n) for n=1..52.

Mathematica

Select[Range[800], Total[Times@@@Partition[Riffle[IntegerDigits[#], {1, -1}, {1, -1, 2}], 2]]==7&] (* Harvey P. Dale, May 01 2022 *)

Crossrefs

Cf. A008593, A060978-A060980, A060982, A061470-A061479, A061870-A061882.

Sequence in context: A121027 A062901 A204094 * A136959 A136952 A136960

Adjacent sequences: A061473 A061474 A061475 * A061477 A061478 A061479

Keyword

nonn,base,easy

Author

Amarnath Murthy, May 05 2001

Extensions

More terms from Robert G. Wilson v, May 10 2001 and from Larry Reeves (larryr(AT)acm.org), May 15 2001

Status

approved