A108840 First step in Recamán's sequence A005132 at which there are n consecutive subtraction steps in a row.

4, 22, 109, 1360, 24404, 17695283, 6824557148

Offset

1,1

Links

Table of n, a(n) for n=1..7.

Eric Weisstein. Recamán's Sequence.

Example

E.g., 109 is the third term of this sequence because it the first step in Recamán's sequence at which there are three consecutive subtraction steps in a row:
109. 370 - 109 = 261
110. 261 - 110 = 151
111. 151 - 111 = 40

Crossrefs

Cf. A005132, A064288.

Sequence in context: A224243 A024420 A220457 * A007994 A006651 A159616

Adjacent sequences: A108837 A108838 A108839 * A108841 A108842 A108843

Keyword

nonn,more

Author

Sergio Pimentel, Jul 25 2005

Extensions

a(6)-a(7) from Jud McCranie, Jan 24 2020

Status

approved