login
A044762
Numbers n such that string 4,9 occurs in the base 10 representation of n but not of n+1.
1
49, 149, 249, 349, 449, 499, 549, 649, 749, 849, 949, 1049, 1149, 1249, 1349, 1449, 1499, 1549, 1649, 1749, 1849, 1949, 2049, 2149, 2249, 2349, 2449, 2499, 2549, 2649, 2749, 2849, 2949, 3049, 3149, 3249, 3349, 3449, 3499
OFFSET
1,1
LINKS
MATHEMATICA
Flatten[Position[Partition[Boole[MemberQ[Partition[IntegerDigits[#], 2, 1], {4, 9}]]&/@Range[3500], 2, 1], {1, 0}]] (* Harvey P. Dale, Dec 21 2014 *)
CROSSREFS
Sequence in context: A162942 A027469 A044381 * A159247 A265423 A226146
KEYWORD
nonn,base
STATUS
approved